Tab Content
• Today, 10:47
Hello!!! (Wave) I am trying to find the solution of the following Cauchy problem. $$\frac{dy}{dx}=\frac{y}{x+ \sqrt{x^2+y^2}}, y(0)=1$$ By...
0 replies | 0 view(s)
• Today, 06:01
If you are allowed to use the Heron's formula, then you can do the following. Let $AB=c$, $BC=a$ and $AC=b$. Then the area of the triangle is...
1 replies | 30 view(s)
• Today, 05:37
Welcome to the forum! I think the meaning of "parameter" is different in this context. This meaning is described in the article about parametrized...
1 replies | 21 view(s)
• Today, 03:13
Here is this week's POTW: ----- Find the exact value for the real root of the equation $x^3+3x-2=0$. ----- Remember to read the POTW...
0 replies | 27 view(s)
• Today, 02:59
Congratulations to the following members for their correct solution::) 1. kaliprasad 2. lfdahl Honorable mention goes to cmath123, as he has his...
1 replies | 107 view(s)
• Yesterday, 14:13
Evgeny.Makarov replied to a thread Jokes in Chat Room
One student claimed that \ln0=e. To prove it, he typed \ln and 0 on a calculator and got the answer e. Another student had to prove that...
154 replies | 17548 view(s)
• February 17th, 2017, 10:19
Evgeny.Makarov replied to a thread Rhombus question in Geometry
\begin{tikzpicture} \renewcommand\ss{2} \coordinate (A) at (0,0); \path (A) ++(220:\ss) coordinate (D); \path (A) ++(-40:\ss) coordinate (B);...
3 replies | 52 view(s)
• February 14th, 2017, 13:25
John and Peter play the following game using a regular chessboard. John thinks of 8 squares so that no two squares lie in the same row or in the same...
0 replies | 33 view(s)
• February 14th, 2017, 13:05
Evgeny.Makarov replied to a thread Java help in Computer Science
The loop should be like this. for (i = userNum; i > 0; --i){ System.out.println(i); if (i == 1) { ...
2 replies | 60 view(s)
• February 12th, 2017, 22:44
Yes, those are typically how these two metrics for the center of the data are used. So it comes down to how do we define "having outliers"? In real...
7 replies | 149 view(s)
• February 12th, 2017, 16:23
Hello!!! (Wave) I am reading about the Method of Four Russians from here. We divide the dynamic programming table $D$ into $t$-blocks such...
0 replies | 35 view(s)
• February 12th, 2017, 13:00
You should use the following facts. The cosine of angle between v_1=(x_1,y_1,z_1) and $v_2=(x_2,y_2,z_2)$ is $\dfrac{v_1\cdot... 2 replies | 70 view(s) • February 11th, 2017, 18:00 Jameson replied to a thread Election in Pre-Algebra and Algebra Hi there. :) Look at the part in red to start with. This kind of issue comes up a lot with word problems. We know that the ratio of purple... 2 replies | 59 view(s) • February 11th, 2017, 17:56 Hi rebo1984, What rules and guidelines have you been given to decide? In general I agree with your answers. The median is less sensitive to... 7 replies | 149 view(s) • February 10th, 2017, 18:00 1^4\cdot29\cdot61\cdot64\mapsto(-2)^4\cdot26\cdot58\cdot61. 6 replies | 145 view(s) • February 10th, 2017, 07:45 There are many ways to traverse a list in Java. Here are several examples. for (Passenger p : passengers) System.out.printf("%s, ",... 2 replies | 67 view(s) • February 10th, 2017, 07:06 Suppose that$QQ'>PP'$. Drop perpendiculars$PR$and$P'R'$on$QQ'$. Let$M$and$N$be the midpoints of$PP'$and$QQ'$, respectively. Then$PRNM$... 5 replies | 73 view(s) • February 9th, 2017, 15:01 Yes. The fact that$PQ=P'Q'$can also be shown geometrically. 5 replies | 73 view(s) • February 9th, 2017, 14:53 Yes, as I said, 4 replies | 63 view(s) • February 9th, 2017, 14:43 Any reflection across a line in the plane is an isometry (a distance-preserving transformation). In this special case it can be shown algebraically... 5 replies | 73 view(s) • February 9th, 2017, 14:31 Do array indices start at 1? Why don't you execute the code by hand and then write an actual program, say, in C to verify the result? For example,... 1 replies | 46 view(s) • February 9th, 2017, 13:47 Note that m=\frac{a-b}{b-a}=-1. Therefore, the line connecting$A(a,b)$and$B(b,a)$is perpendicular to the graph of$y=x$(it is known that the... 4 replies | 63 view(s) • February 9th, 2017, 12:36 Here is this week's POTW: ----- Given that$\sqrt{x^3+1648}-\sqrt{4949-x^3}=75$for$x\in\Bbb{N}$. Find$x$. ----- Remember to read the... 1 replies | 107 view(s) • February 9th, 2017, 12:26 No one answered last week's problem.(Sadface) You can find the suggested solution as follows: Let... 1 replies | 138 view(s) • February 9th, 2017, 10:26 Evgeny.Makarov replied to a thread Pun Thread in Chat Room Dave wanted to become rich, but genie instead changed his name to Rich. Paddy and Murphy are on a cruise ship late one night. Paddy says to... 50 replies | 7704 view(s) • February 9th, 2017, 10:02 Nice job. I know of one more solution, but I am not sure of how many there are. 6 replies | 145 view(s) • February 8th, 2017, 20:14 I think there is probably a mental peak of our lives, but that doesn't mean that anyone is ever too old to pursue math. When I was 18 I was a... 8 replies | 173 view(s) • February 8th, 2017, 16:31 Evgeny.Makarov replied to a thread Pun Thread in Chat Room The genie granted Dave's first wish by making him Rich. Look at the names carefully. 50 replies | 7704 view(s) • February 8th, 2017, 14:28 Evgeny.Makarov replied to a thread Pun Thread in Chat Room Q: How do you make 7 even? A: You take away the "s". Teacher: What's$\sin(Q)/\cos(Q)$? Student:$\tan(Q)\$. Teacher: You're welcome. Genie:...
50 replies | 7704 view(s)
More Activity

### 4 Visitor Messages

1. Hello and welcome back to MHB, bwpbruce!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

MarkFL.
2. Hello and welcome back to MHB, bwpbruce!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

anemone.
3. Hello and welcome back to MHB, bwpbruce!

We are happy to see that you have returned, and we look forward to your continued participation here!

On Behalf Of MHB's Staff,

Ackbach.
4. Hello and welcome to MHB, bwpbruce!

If you have any questions or comments about the forums, please feel free to address them to me or another staff member. We are happy to help and look forward to your participation here!

Best Regards,

Mark.
Showing Visitor Messages 1 to 4 of 4

#### Signature

MHB is the best Mathematics Help Board on Earth.

#### Statistics

Total Posts
56
Posts Per Day
0.06
Thanks Given
13
26
##### Visitor Messages
Total Messages
4
Most Recent Message
January 4th, 2017 11:17
##### General Information
Last Activity
January 31st, 2017 19:24
Last Visit
January 31st, 2017 at 15:11
Last Post
January 5th, 2017 at 09:31
Join Date
September 11th, 2014

### 5 Friends

1. #### anemoneOffline

Paris la ville de l'amour

MHB Master

MHB Master

4. #### Fallen AngelOffline

MHB Craftsman

5. #### JamesonOffline

Администратор

Showing Friends 1 to 5 of 5